Malformed URL exception

Hi,
recently, Doggcatcher would not play feeds from WDR (German radio station) anymore. The files appear in the list, but have a red dot, and in the event log entry, it says download failed, and under detail it says 'java.net.malformedURLException:no protocol: //wdrmedien-a.akamaihd.net/medp/podcast/......
This affects exclusively WDR podcasts (as far as I can tell).
However, I have tried downloading these podcasts using 'podbean', and there they work just fine, so I have to assume there is some new incompatibility with doggcatcher. Needless to say, all the WDR podcasts were handled well by DC in the past.
Any suggestions?
Thank you!